Name Info Provider Link
subscription/membership/fee required American Psychological Association http://content.apa.org/journals/adb/36/5/565
Quitting Smoking free resource MedlinePlus Health Information https://medlineplus.gov/quittingsmoking.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34323527.ui